8Kbit dual-port async SRAM in 52-PLCC
The CY7C131-25JXC is an 8Kbit dual-port asynchronous SRAM from Infineon, organized as 1K x 8 bits. The dual-port architecture allows two independent systems or controllers to read from and write to the same memory array simultaneously, with arbitration logic handling access contention. With a 25 ns access time and matching 25 ns write cycle time, this part suits moderate-speed shared-memory applications where both ports need deterministic latency. The parallel interface keeps the bus simple — no serial protocol overhead, just address, data, and control lines.
The commercial temperature grade (0°C to 70°C) limits it to indoor, climate-controlled environments; not rated for extended industrial or automotive ambient ranges. Housed in a 52-lead PLCC (J-Lead) package, the 19.13 mm x 19.13 mm body is a through-hole-reflow-friendly footprint. The J-leads offer good board-level reliability under thermal cycling, and the package is hand-solderable with a fine-tip iron — a plus for prototyping or low-volume repair work.
Infineon lists the CY7C131-25JXC as obsolete. No official successor part number is recorded. Because this is a legacy dual-port SRAM with no direct pin-compatible replacement from Infineon, a board redesign may be required if supply runs dry. Sourcing through independent distribution provides a bridge for sustaining production while a migration plan is developed.